81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
//===-- MSP430ELFStreamer.cpp - MSP430 ELF Target Streamer Methods --------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file provides MSP430 specific target streamer methods.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "MSP430MCTargetDesc.h"
|
|
#include "llvm/BinaryFormat/ELF.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCELFStreamer.h"
|
|
#include "llvm/MC/MCSectionELF.h"
|
|
#include "llvm/MC/MCStreamer.h"
|
|
#include "llvm/MC/MCSubtargetInfo.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace llvm {
|
|
|
|
class MSP430TargetELFStreamer : public MCTargetStreamer {
|
|
public:
|
|
MCELFStreamer &getStreamer();
|
|
MSP430TargetELFStreamer(MCStreamer &S, const MCSubtargetInfo &STI);
|
|
};
|
|
|
|
// This part is for ELF object output.
|
|
MSP430TargetELFStreamer::MSP430TargetELFStreamer(MCStreamer &S,
|
|
const MCSubtargetInfo &STI)
|
|
: MCTargetStreamer(S) {
|
|
MCAssembler &MCA = getStreamer().getAssembler();
|
|
unsigned EFlags = MCA.getELFHeaderEFlags();
|
|
MCA.setELFHeaderEFlags(EFlags);
|
|
|
|
// Emit build attributes section according to
|
|
// MSP430 EABI (slaa534.pdf, part 13).
|
|
MCSection *AttributeSection = getStreamer().getContext().getELFSection(
|
|
".MSP430.attributes", ELF::SHT_MSP430_ATTRIBUTES, 0);
|
|
Streamer.SwitchSection(AttributeSection);
|
|
|
|
// Format version.
|
|
Streamer.emitInt8(0x41);
|
|
// Subsection length.
|
|
Streamer.emitInt32(22);
|
|
// Vendor name string, zero-terminated.
|
|
Streamer.emitBytes("mspabi");
|
|
Streamer.emitInt8(0);
|
|
|
|
// Attribute vector scope tag. 1 stands for the entire file.
|
|
Streamer.emitInt8(1);
|
|
// Attribute vector length.
|
|
Streamer.emitInt32(11);
|
|
// OFBA_MSPABI_Tag_ISA(4) = 1, MSP430
|
|
Streamer.emitInt8(4);
|
|
Streamer.emitInt8(1);
|
|
// OFBA_MSPABI_Tag_Code_Model(6) = 1, Small
|
|
Streamer.emitInt8(6);
|
|
Streamer.emitInt8(1);
|
|
// OFBA_MSPABI_Tag_Data_Model(8) = 1, Small
|
|
Streamer.emitInt8(8);
|
|
Streamer.emitInt8(1);
|
|
}
|
|
|
|
MCELFStreamer &MSP430TargetELFStreamer::getStreamer() {
|
|
return static_cast<MCELFStreamer &>(Streamer);
|
|
}
|
|
|
|
MCTargetStreamer *
|
|
createMSP430ObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
|
|
const Triple &TT = STI.getTargetTriple();
|
|
if (TT.isOSBinFormatELF())
|
|
return new MSP430TargetELFStreamer(S, STI);
|
|
return nullptr;
|
|
}
|
|
|
|
} // namespace llvm
|